Epdm balls (ethylene-propylene-diene monomer) offer excellent resistance to high temperatures, ageing, and external agents such as UV. Their flexibility also allows them to function well at lower temperatures. Available with a peroxide cross-linking agent for improved characteristics.
Physical characteristics of EPDM rubber ball
| Ownership | Value | Unit |
|---|---|---|
| Density | 1.2 | g/cm3 |
| Young Module | 8 | MPa |
| Thermal expansion coefficient | 165 (T=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 0.15 | W/m·K |
| Electrical resistivity | >10^21 | D·mm2/m |
| Relative magnetic permeability | <~1 | — |
| Magnetic behaviour | Diamagnetic | — |
| Friction coefficient | 0.5 | — |
| Fracture extension | max 600 | % |
| Remanent compression | 35 | % |
Hardness and mechanical resistance of EPDM rubber ball
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 75-90 | Shore A |
| Tensile failure load | 11-15 | MPa |
| Tensile failure load | 1,60-2,18 | psix10^3 |
| Exercise temperatures | -30/130 | ° C |
| Exercise temperatures | -22/266 | °F |
Available diameters and grades for EPDM rubber ball
| Parameter | Value |
|---|---|
| Minimum diameter | 1 mm — 3/64′′′ |
| Maximum diameter | 152.4 mm — 6′′′ |
| Grades available | III |
Corrosion resistance of EPDM rubber ball
EPDM rubber is resistant to water, steam, ozone, alkalis, alcohols, ketones, esters, glycols, saline solutions and oxidizing substances, low acids, detergents and many organic and inorganic bases. Not suitable for contact with petrol, diesel, fats, mineral oils and aliphatic, aromatic and chloride hydrocarbons.
Applications of EPDM rubber ball
Used for various industrial applications, almost always as sealing or floating elements. Also used in environmental devices, for applications exposed to weather.
